HenryYelverton, 3rd Earl of Sussex was born on 7 July 1728.1 He was the son of TalbotYelverton, 1st Earl of Sussex and LucyPelham.1 He married, firstly, HesterHall, daughter of JohnHall, on 17 January 1757.1 He married, secondly, MaryVaughan, daughter of JohnVaughan, on 29 January 1778.1 He died on 22 April 1779 at age 50.1 He was educated at Westminster School, Westminster, London, England.2 He was educated at Hertford College, Oxford University, Oxford, Oxfordshire, England.2 He gained the rank of Cornet in 1752 in the service of the 7th Dragoons.2 He gained the rank of Lieutenant in 1755.2 He gained the rank of Captain between 1756 and 1759 in the service of the 31st Foot.2 He succeeded to the title of 18th Lord Grey, of Ruthin [E., 1325] on 8 January 1758.1 He succeeded to the title of 3rd Earl of Sussex [G.B., 1717] on 8 January 1758.1 He succeeded to the title of 7th Baronet Yelverton on 8 January 1758. He succeeded to the title of 4th Viscount de Longueville [E., 1690] on 8 January 1758.1 He gained the rank of Colonel in 1779.2 On his death all of his titles became extinct, except for the Barony of Grey.1